ECO mode BMW 318i 1997 E36 Service Manual

Tablea
.
E36
Component
Locations

Component



Model
Year



Location



Refer
to
Engine
Compartment
Light
Switch



1993-1996



Over
right
headlight
assembly



Fig
.
7
.

Engine
Control
Module
(ECM)



1992-1998



Right
rear
enginecompartment,
behind
bulkhead
panel



Fig
.
7
.

Engine
Control
Module
(System)



1992-1998



I
Power
distribution
box



Fig
.
2
.
Relay
Engine
Coolant
Leve¡
Sensor



1
1992-1998



1
Left
front
of
enginecompartment,
radiator
coolant
reservoir

Engine
Coolant
Temperature



1992-1998



I
Left
front
of
engine
under
intake
manifold



I



Fig
.
19
.
Sensor



Fig
.
20
.

Evaporative
Emission
Valve



1992-1998



Left
side
strut
Power
area

Evaporator
Temperature
Sensor



1992-1998



Left
side
of
heater
box

EWS
II
Control
Module



1/1995
-
1998



Behind
glove
compartment



Fig
.
8
.
Fig
.
9
.

EWS
II
Ring
Antenna



1
1/1995
-
1998
1
At
ignition
cylinder

EWS
II
Transmitter
Module



1/1995
-
1998



Right
side
of
steering
column
in
auxiliaryrelay
panel



Fig
.
3
.

Exhaust
Gas
Flap
Valve



1996-1998



Left
rear
muffler
area

Flasher
Relay



1992-1998



Power
distribution
box



Fig
.
2
.

Foglight
Relay



1



1992-1998



1
Power
distribution
box



1



Fig
.
2
.

Fresh
Air
FlapActuator



1



1992



1
Right
side
of
heater
box

Fresh
Air
FlapActuator



1
1993-1995



1
Below
right
side
heater
box

Fresh
Air
FlapActuator



1
1996-1998



Below
left
side
heater
box

Fuel
Injectors



1992
-
1998



Top
left
side
of
engine

Fuel
Leve¡
Sensor,
Left



1
1992-1998



/
Under
left
side
of
rear
seat
infuel
tank

Fuel
Leve¡
Sensor,
Right



1



1992-1998



1
Under
right
side
of
rear
seat
in
fuel
tank



1



Fig
.
28
.

Fuel
Pump



1



1992-1998



1



Under
right
side
of
rear
seat
in
fuel
tank



1



Fig
.
28
.

Fuel
Pump
Relay



1



1992-1998



1
Power
distribution
box



1



Fig
.
2
.

Fuel
Pump/Start
Identification
Relay



1994
-
1996



Power
distribution
box

Fuel
Tank
Pressure
Sensor



1
1997-1998



1
Right
rear
wheel
well
behind
trim
liner

ELECTRICAL
COMPONENT
LOCATIONS



610-13

Fuse
andRelay



x(Power



11992-1998



I
Left
side
of
engine
compartment



I



Fig
.
2
.
Distribution
Box



Fig
.
7
Fig
.
10
.

Gas
Filler
LockMotor



1992-1998



Right
side
of
luggage
compartment

Gear
Position/Neutral
Safety
Switch



1992-1998



Next
to
gear
shift
lever
in
center
console



Fig
.
29
.
(Automatic
Transmission
Range
Switch)

Glove
Compartment
Lock
Motor



1994-1998



Behind
glove
compartment

Grounds

G
100



1995-1998



Front
of
left
front
fender
(headlights)



Fig
.
22
.

G
101



1992-1998



Front
of
right
front
fender

Continued

COMPONENT
LOCATIONS

Tablea
.
E36
Component
Locations

Component



Model
Year



Location



Refer
to
Rollover
Sensor



1994-1998



In
lower
left
C-pillar
behind
trim
panel
(Convertible)

Seat
Belt
Switch



1992-1998



In
front
seat
belt
buckle

SeatCushion
Tilt
Motor



1992-1998



Under
front
seat

Seat
Heater



1993-1998



Under
front
seat

Seat
Height
Motor
Front



1992-1998



Under
front
seat

Seat
Movement
Motor



1992-1998



Under
front
seat

Seatback
Heater



1993-1998



In
upper
front
seatback

Seatback
Recliner
Motor



1993-1998



Under
front
seat

Seat
Occupancy
Detector



1994-1998



Under
rightfront
seat

Secondary
Air
Pump
(4-cyl
.)



1997
1
/2
-
1998



Left
engine
compartment,
belowpower
distribution
box
(M44
engine)

Secondary
Air
Pump
(6-cyl
.)



1996-1998



Front
of
engine
compartment
(M52/S52US
engine)

Secondary
Air
Pump
Relay



1996-1998



Power
distribution
box



Fig
.
2
.

Secondary
Air
Pump
Valve



1996-1998



Right
sideof
engine

Side
Impact
Air
Bag
Right/Left



1997-1998



Behind
right/left
door
trim
panel

Síde
Impact
Airbag
Crash
Sensor,



1997-1998



Right/left
door
si¡¡
behind
front
seat
Right/Left

Shift
Interlock



1992-1998



Center
console
beside
shift
selector

Slip
Control
Module
(ABS/AST)



1992-1998



Behind
glove
compartment



Fig
.
8
.
Fig
.
9
.

Splice
Panel,
Left
Side



1992-1998



Behind
footwell
speaker
grill



Fig
.
5
.

SplicePanel,
Right
Side



1992-1998



Behind
glove
compartment



Fig
.
6
.

Starter



1992-1998



Leftrear
of
engine

Starter
Immobilization
Relay



1994-1998



In
left
splice
panelbehind
footwell
speaker
grill

Starter
Relay



1992-1993



Below
left
side
of
dash

Starter
Relay



1994-1998



Behind
left
footwell
speaker
grill

Sunroof
Control
Assembly



1992-1998



In
roof
center
panel

Supplemental
Restraint
System



11992-1993



I
Behind
glove
compartment



I



Fig
.
8
.
(Airbag)
Control
Module



Fig
.
9
.

Supplemental
Restraint
System



1994-1998



1
Under
center
of
rear
seat
(Airbag
ZAE)
Control
Module

Switch,
Power
Window



1
1992-1998



1
Center
console

Telephone
Eject
Box



1
1994-1996



1
Center
console

ELECTRICAL
COMPONENT
LOCATIONS



610-17

Telephone
Transceiver



1992-1992



In
luggage
compartment

Throttle
Flap
Heater



1994-1996



Left
sideof
engine

Throttle
Position
Sensor



1992-1998



I
Left
sideof
engine
inthrottle
housing



I



Fig
.
7
.
Fig
.
15
.
Fig
.
21
.

Continued

COMPONENT
LOCATIONS

611
Wipers
and
Washers

GENERAL
..
.
.
.
.
.
.
.
.
.
.
.
.
.
.....
.
......
.
611-1



Windshield
wiper
motor,

removing
and
installing
.
...............
.611-8

WIPER
BLADES
.
.
.
.....
.
.
.
.
.
.
...
....
.611-1

Wiper
Blade
Cleaning
Problems
.
.
.
.
.
.
.....
611-1

Wiper
blades,replacing
...
.
.
.
.
.
.
.
.
.
.....
611-1

Wiper
blade
inserts,
replacing
.
.
.
.
.
.
.
.
.....
611-2

Wiper
arms,
removing
and
installing
.
.
.
.....
611-2

WINDSHIELD
WIPER
ASSEMBLY
.
.
.....
611-3

Windshield
wiper
assembly,
removing

and
installing
(4-door
models)
.
.
.
.
.
.
.....
611-3

Windshield
wiper
assembly,
removing

and
installing
(2-door
models)
.
.
.
.
.
.
.....
611-5

GENERAL

This
repair
group
covers
windshield
wiper
and
washer
sys-

tem
repair
information
.
Please
note
that
some
procedures
are

different
for
2-
and
4-door
models
.

The
windshield
wiper/washer
stalk
switch
assembly
is
cov-

ered
in
612
Switches
and
Electrical
Accessories
.
Electrical



NOTE-
wiring
diagrams
and
relays
for
the
wiper/washer
system
are



BMwhas
available
a
special
toollgauge
(BMWspecial
covered
in
Electrical
Wiring
Diagrams
.



tool
no
.
00
9210)
to
align
the
angle
of
the
wiper
arm
to
the
windshield
glass
.

WIPERBLADES

CA
UTION-

Never
turn
on
the
wiper
blades
while
the
hood
is
open
.
Damage
to
the
wiper
system
and
hood
may
occur
.
Toensure
safetyduring
wiper
biade
system
procedures,
remove
the
windshieldwiper
fuse
.
See
610
Electrical
Component
Locations
.

Wiper
Blade
Cleaning
Problems

Common
cleaning
problems
with
thewipers
includestreak-

ing
or
sheeting,
waterdrops
after
wiping,
and
blade
chatter
.

Streaking
is
usually
caused
when
wiper
blades
are
coated

with
road
film
or
car
wash
wax
.
Clean
the
blades
using
soapy

water
.
If
cleaning
does
not
cure
the
problem,
the
blades
should
be
replaced
.
BMW
recommends
replacing
the
wiper

blades
twice
a
year,
before
and
after
the
cold
season
.

WIPERS
AND
WASHERS



611-1

WINDSHIELD
CLEANING
SYSTEM
......
611-9

Windshield
spray
nozzle,

removing
and
installing
.......
.
........
.611-9

Washer
fluid
reservoir,
replacing
.........
.611-9

Windshield
washer
fluid
pump,
replacing
..
.
......
.
........
.611-9

Washer
fluid
level
sensor,
replacing

(models
with
check
control)
.
.
.
.
........
611-10

Wiper
blade
chatter
may
be
caused
by
dirty
or
worn
blades,

or
by
wiper
arms
that
areout
of
alignment
.
Clean
the
blades
and
windshield
as
described
above
.
Adjust
the
wiper
arm
so

that
there
is
even
pressure
along
the
blade,
and
so
that
the

blade
at
rest
is
perpendicular
to
the
windshield
.
If
problems

persist,
theblades
and
wiper
arms
should
be
replaced
.

The
wiper
blades
can
be
renewed
in
one
of
two
ways
:
either

by
replacing
the
complete
blade
or
by
replacing
just
therubber

insert
.

Insert
replacement
is
the
mosteconomicalmethod,
al-

though
overtime
the
wiperblade
itselfwill
become
worn
.
One

ruleof
thumb
wouldbe
to
replace
just
the
inserts
every
second

time
.

Wiper
blades,
replacing

1
.
Pivot
wiper
arm
off
windshield
.

2
.
Position
wiperblade
approximately
perpendicular
to

wiper
arm
.

3
.
Remove
wiperblade
from
wiper
arm
by
depressing
re-

taining
tab
and
sliding
blade
out
of
arm
.
See
Fig
.
1
.

Drops
that
remain
behind
after
wiping
are
usually
caused
by



NOTE-

oil,
road
film,
or
diesel
exhaust
residue
onthe
glass
.
Use
an



Some
wiperblade
versions
may
havetwo
retaining

alcohol
or
ammonia
solution
or
a
non-abrasive
cleaner
(such



tabs
.

a
s
Bon-Ami



to
clean
the
windshield
.

GENERAL

611-
1
0



WIPERS
AND
WASHERS

Washer
fluidleve¡
sensor,
replacing

(modeis
with
check
control)

The
washer
fluid
level
sensor
is
mounted
in
the
fluid
reser-

voir,
near
the
bottom
of
thecontainer
.

NOTE-

Check
wire
leads
at
sensor
for
worn
insulation
and
cor-
rosion
.
Check
electrical
contacts
in
harness
connector
for
corrosion
.

1
.
Open
hood
and
siphon
out
washer
fluid
reservoir
.

2
.
Lift
harness
connector
retaining
lever
and
unplug
har-

ness
connector
to
washer
fluid
level
sensor
.
See
Fig
.

23
.

3
.
Pul¡
fluid
leve¡
sensor
out
from
rubber
grommet
.

4
.
Install
new
sensor
into
reservoir
.
Check
sealing
grom-
met
for
correct
fit
.
Replace
if
damaged
.

WINDSHIELD
CLEANING
SYSTEM

GENERAL

E36
cars
are
equipped
with
integrated
automatic
heating

and
air
conditioning
systems
.
Many
of
the
procedures
given
in

this
repair
group
require
that
the
A/C
refrigerant
charge
be

evacuated
using
specialized
equipment
.
See
A/C
System
Warningsand
Cautions
later
in
this
repair
group
.

HEATER
AND
CONTROLS

Blower
motor,
removing
and
installing

NOTE-

On
6-cylinder
cars,
the
plastic
top
enginecover
and
fuel
rail
covermustbe
removed
.
The
fuel
injectorhamess
re-
taining
screws
must
be
removed
and
the
harness
set
aside
.
The
engine
control
module
(ECM)
cover
must
be
removed,
the
control
unit
connectors
unplugged
and
the
harness
pulled
out
of
the
way
.
See
130
Fuel
Injection
.

1
.
Disconnect
negative
(-)
cable
from
battery
.

2
.
Open
hood
.
Unclip
engine
bulkhead
plenum
grille
at

base
of
windshíeld
and
remove
grille
.
See
Fig
.
1
.

HEATING
AND
AIR
CONDITIONING



640-1

640
Heating
and
Air
Conditioning

GENERAL
.
...
.
....
.
.
.
.
.
.
.
.
.
.......
.
.
.
640-1



Heater
andA/C
air
distribution
motor,

replacing(rotary-knob)
.
.
...
.
.
.
.......
.
640-10

HEATER
AND
CONTROLS
.
.....
.
.
.
.
.
.
.640-1



Rear
Window
Defogger
.
.
.



.
.
.
.
.
.
.
...
.
.
.
640-10
Blower
motor,
removing
and
installing
.
.
.
.
.
.
640-1



Rear
Window
Blower
(convertible
models)
.
.640-10

Blowermotor
resistor
pack,
replacing



.
.
.
.
.
.
640-3



AIR
CONDITIONING
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
640-11
Heater
valve,
replacing
...........
.
.
.
.
.
.
.
640-3

Heater
box,
removing
and
installing
.
.
.
.
.
.
.
.
640-4



A/CSystem
Warnings
and
Cautions
.
.
.
.
.
.
:640-11

Heater
core,
replacing
.....
.
.
:
....
.
.
.
.
.
.
.
640-6



A/C
compressor,
replacing
.
.
::.
:
:
.
.
.
.
.
.
.
.640-12

Heater
core
temperature
sensor,
replacing
.
.
640-7



A/C
Compressor
Clutch
.
.
.
.
.
.
.
:
.
.
.
.
.
.
.
.
.
640-13

Heater
andA/C
Control
Head
.
.
....
.
.....
.
640-7



A/C
condenser,
replacing
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
640-14

Heater
andA/C
control
head,
removing



A/C
receiver/drier,
replacing
.
.
.
.
.
.
.
.
.
.
.
.
.
640-15
and
installing
(rotary-knob)
.
.
....
.
......
640-7



A/C
expansion
valve,

Heater
andA/C
control
head,
removing



removing
and
installing
...
.
.....
.
.
.
.
.
.
.
640-16
and
installing
(digital-display)
.
.....
.
.....
640-8



A/C
evaporator,
removing
and
installing
.
.
..
640-17

Heater
andA/C
control
module,removing



A/C
evaporator
temperature
sensor,

and
installing
(rotary-knob)
.
.
...
.
.
.
.
.
.
.
.
640-8



replacing
.
.
.
.
.
.
..............
.
.
.
.
.
..
640-17

Heater
andA/C
control
module,removing



A/C
microfilter,
replacing
......
.
....
.
.
.
..
640-18

and
installing
(digital-display)
.
...
.
.
.
.
.
...
640-8

Sensor
fan
for
interior
temperature,



TABLES

replacing
.
.
.
....
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
640-9



a
.
Blower
Motor
Test
Values
.........
...
.
.
......
640-3

Heater
andA/C
AirDistribution
Motors
.
.
.
.
.
.
640-9



b
.
Heater
Core
Temperature
Sensor
Test
Values
...
.640-7

c
.
Evaporative
Temperature
Sensor
Test
Values
...
640-17

d
.
A/C
System
Fluid
Capacities
(total)
..
..........
640-18

0012527

Fig
.
1
.
Detach
grille
retaining
clips
(arrows)
and
pull
grille
upward
and
out
of
rubbergasket
.

CAUTION-

Prior
to
disconnectiog
the
battery,
read
the
battery
disconnection
cautionsgiven
at
the
front
of
this
manual
onpage
viii
.

HEATER
AND
CONTROLS

640-4



HEATING
AND
AIR
CONDITIONING

Heater
box,
removing
and
installing

The
heater
box,
located
underneath
thecenter
of
the
dash-

board,
houses
theheater
core,
the
A/C
evaporator,
and
asso-

ciated
sensors
and
actuators
.
Removal
of
theheater
box

requires
that
the
A/C
refrigerant
be
discharged
.

CAUTION-

"
Removing
the
heater
box
requires
evacuating
the
AIC
system
.
DO
NOT
attempt
this
procedure
without
proper
tools
and
training
.

"
Any
person
who
services
a
motor
vehicle
air
con-

ditioner
must,
by
law,
be
properly
trained
and
cer-
tified,
and
use
approved
refrigerant
recycling
equipment
.
Technicians
must
complete
an
EPA-
approved
recycling
course
to
be
certified
UU12639

Fig
.
10
.
Heater
core
mounting
nuts
at
left
sideof
bulkhead
(arrow)
.

1
.
Drain
engine
coolant
.
See
170
Radiator
and
Cooling



wiper
assembly
shown
removed
for
clarity
.

System
.

2
.
Remove
complete
dashboard
.
See513
Interior
Trim
.

3
.
Remove
blower
motoras
described
earlier
.

4
.
Remove
nut
retaining
water
hose
flange
to
rear
bulk-
head
.
I'ush
flange
to
one
side
.
See
Fig
.
9
.

Fig
.
9
.



Nut
retaining
coolant
hose
flangeat
bulkhead
(arrow)
.

NOTE-

Clear
any
remaining
coolant
from
the
heater
core
by
blowing
compressed
air
finto
the
coolant
feed
hose
.

HEATER
AND
CONTROLS

0012638b

6
.
Cut
wire
tie
holding
wire
harness
to
heater
box
and
dis-

connect
cable
harness
connector
from
heater
box
.
See

Fig
.
11
.

0012647

Fig
.
11
.
Harness
connectors
(A)
and
cable
tie
(B)
at
heaterbox,
under
driver
side
dash
.

7
.
Followingmanufacturer's
instructions,
connect
ap-

proved
refrigerant
recovery/recycling/recharging
unitto

A/C
system
and
discharge
system
.

8
.
Unbolt
A/C
refrigerantlines
flange
from
engine
bay
bulkhead
.
See
Fig
.
12
.

9
.
On
models
with
rotary-knob
A/C
control
head
:
Discon-
5
.
Remove
nuts
from
heater
box
retaining
bracket
on
en-



nect
wiring
harness
connectors
to
A/C
control
module
gine
bulkhead
left
side
.
See
Fig
.
10
.
Repeat
procedure



in
center
console
and
remove
module
.
See
Fig
.
13
.
for
right
side
nuts
.

721
Airbag
System
(SRS)

Airbag
Systems
.......
.
...
.
.
.
.
.
....
.
.
.
.
721-1

AIRBAG
SENSORS
AND
ELECTRONICS
721-2

SRS
Warning
Light
and
Fault
Display
.
.
.
.
.
..
721-2

Airbagcontact
ring,
replacing
........
.
.
.
.
.
721-3

Airbag
crash
sensor,replacing
..
.
....
.
...
.
721-4

ZAE
control
module,
replacing
.
.
.
.........
721-5

GENERAL

This
repair
group
covers
only
removal
and
installation
of
air-
bag
components
.
Airbag
system
repair
and
fault
diagnosis
is
not
covered
here
.
Diagnostics,
component
testing,
and
airbag
system
repair
should
be
carried
out
by
trained
BMW
service
technicians
.

NOTE-

Special
test
equipment
is
required
to
retrieve
SRS
fault
codes,
diagnose
system
faults,
and
resetltum
off
the
SRS
indicator
light
.
The
SRS
indicator
light
will
remain
on
until
any
problem
has
been
corrected
and
the
fault
memory
has
been
cleared
.

When
servicing
cars
equipped
with
SRS,
the
precautions

on
this
page
mustbeobserved
to
prevent
personal
injury
.

Airbag
Systems

The
airbag
system
installed
on
E36
cars
through
the
1993
model
year
consisted
of
a
single
airbag
in
the
steering
wheel
.
This
systemcan
be
identified
by
the
orange
crash
sensors
lo-
cated
on
the
front
wheel
wells
and
the
absence
of
a
passenger
side
airbag
.

The
ZAE
airbag
system,
starting
in
model
year
1994
(pro-
duction
date9/93
and
later),
provides
both
a
driver
side
and
a
passenger
sideairbag
.
On
ZAE
vehicles,
the
crash
sensorsare
integrated
into
the
airbag
control
module,
located
under
thecenter
of
the
rear
seat
.
The
ZAE
control
module
triggers

deployment
of
the
airbags
When
it
sensos
the
vehicle
deceler-
ating
at
a
rate
equivalent
to
a
head-on
collisionof
at
least
13
mph
(18
km/h)
.

In
some
1997
4-door
models
and
all
1998
models,
side-impact
airbags
were
installed
in
the
front
doors
.
The
airbag
units
are

mounted
behindthe
door
trim
panels
.
Caution
mustbeused

when
working
on
vehicle
systems
in
the
proximity
of
air
bags,
such
as
the
steering
column,
the
dashboard,
or
the
doors
.

AIRBAG
SYSTEM
(SRS)



721-1

GENERAL
.
.
.
.
.
.
.
.
.
.
.......
.
......
.
.
.
.
721-1



Front
side-impact
airbag
crash
sensor,
removing
and
installing
....
.
.....
.
.....
.
721-5

AIRBAGS



..............
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
721-5

Driver
side
airbag,
removing
and
installing
.
.
.
721-5

Passenger
side
airbag,

removing
and
installing
..............
.
.
.721-6

Front
side-impact
airbag,
removing
and
installing
.
.
.
.
.
.
.
.
.
.
......
.721-7

WARNING
-

"
Airbag(s)
are
inflated
byan
explosive
device
.
Handled
improperly
or
without
adequate
safe-
guards,
the
System
can
be
very
dangerous
.
Spe-
cial
precautions
must
be
observed
prior
to
any
work
ator
near
the
driverside
airbag,
the
passen-
ger
side
airbag
(where
applicable)
or
the
side-im-
pact
airbags
(where
applicable)
.

"
The
airbag
is
a
vehicle
safety
system
.
Serious
in-
jury
may
result
if
System
service
is
attempted
by
persons
unfamiliar
with
the
BMW
SRS
and
its
ap-
proved
service
procedures
.
BMW
advises
that
all
inspection
and
service
be
performed
by
an
autho-
rized
BMW
dealer
.

"
Always
disconnect
the
battery
and
cover
the
neg-
ative
()
battery
terminal
with
an
insulator
before
startingdiagnostic,
troubleshooting
or
service
worknot
associated
with
SRS,
and
before
doing
any
welding
on
the
car
.

"
If
an
airbag
has
been
activated
due
to
an
acci-dent,
BMW
specifies
that
SRS
components
be
replaced
.
For
more
information
on
post-collision
SRS
service,
see
an
authorized
BMW
dealer
.

"
Do
not
allow
the
airbag
unit
to
come
in
contact
with
cleaning
solutions
orgrease
.
Never
subject
an
airbag
unit
to
temperatures
aboye
212°F
(100°C)
.
When
reconnecting
the
battery,
no
per-
son
should
be
inside
the
vehicle
.

"
Always
place
an
airbag
unitthat
has
been
re-
moved
from
its
packaging
with
the
padded
sidefacing
upward
.
Do
not
leave
an
airbag
unlt
unat-
tended
.

"
!f
the
airbag
unit
or
airbag
control
modulehas
been
dropped
froma
height
of
!
1
2
meter
(1
Y2
ft.)
ormore,
theairbag
unit
should
not
be
installed
.

Aírbag
system
components
are
shown
in
Fig
.
1.

GENERAL

ELE-98
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325i,
325iC
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